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    • 3. 发明申请
    • HIGH VOLTAGE, HIGH FREQUENCY ESD PROTECTION CIRCUIT FOR RF ICs
    • 用于RF IC的高电压,高频ESD保护电路
    • US20110176245A1
    • 2011-07-21
    • US12748067
    • 2010-03-26
    • Eugene R. WorleyByungWook MinDer-woei Wu
    • Eugene R. WorleyByungWook MinDer-woei Wu
    • H02H9/00
    • H03F1/52H01L27/0274
    • Improved ESD protection circuits for RFICs requiring both high voltage and high frequency operation is described. A cascode grounded gate snap-back NFET (GGNFET) combined with a precharge circuit and a diode network results in a positive ESD protection clamp with low capacitance and high turn-on voltage. The positive ESD protection clamp provides ESD protection to an IC during a positive voltage ESD pulse. Exemplary embodiments of a negative ESD protection clamp are disclosed where a bias circuit or a charge pump is used in place of the precharge circuit in a manner that allows the combination of the bias circuit or the charge pump together with a diode network and a cascode grounded gate snap-back NFET to provide protection against negative ESD voltage pulses. The combination of a positive and a negative ESD protection clamp provides ESD protection to an IC during either a positive or a negative voltage ESD pulse. Alternate embodiments further reduce the capacitance of the ESD protection circuit by using only a positive ESD clamp to provide ESD protection during a positive ESD pulse while protection for a negative ESD pulse is provided by a discharge path formed by a path of an RF front-end switch coupled to a negative ESD diode.
    • 描述了需要高压和高频操作的RFIC的改进的ESD保护电路。 与预充电电路和二极管网络相结合的共源共栅接地栅极复位NFET(GGNFET)导致具有低电容和高导通电压的正ESD保护钳位。 正电压ESD保护钳在正电压ESD脉冲期间为IC提供ESD保护。 公开了一种负ESD保护钳的示例性实施例,其中使用偏置电路或电荷泵代替预充电电路,以允许偏置电路或电荷泵与二极管网络和共源共栅接地的组合 门复位NFET,以提供防止负ESD电压脉冲的保护。 在正或负电压ESD脉冲期间,正和负ESD保护钳的组合可为IC提供ESD保护。 替代实施例通过仅使用正的ESD钳位来在正的ESD脉冲期间提供ESD保护来进一步减小ESD保护电路的电容,同时通过由RF前端的路径形成的放电路径来提供负的ESD脉冲的保护 开关耦合到负ESD二极管。
    • 4. 发明授权
    • High voltage, high frequency ESD protection circuit for RF ICs
    • RF IC的高压,高频ESD保护电路
    • US08427796B2
    • 2013-04-23
    • US12748067
    • 2010-03-26
    • Eugene R. WorleyByungWook MinDer-woei Wu
    • Eugene R. WorleyByungWook MinDer-woei Wu
    • H02H9/00
    • H03F1/52H01L27/0274
    • Improved ESD protection circuits for RFICs requiring both high voltage and high frequency operation is described. A cascode grounded gate snap-back NFET (GGNFET) combined with a precharge circuit and a diode network results in a positive ESD protection clamp with low capacitance and high turn-on voltage. The positive ESD protection clamp provides ESD protection to an IC during a positive voltage ESD pulse. Exemplary embodiments of a negative ESD protection clamp are disclosed where a bias circuit or a charge pump is used in place of the precharge circuit in a manner that allows the combination of the bias circuit or the charge pump together with a diode network and a cascode grounded gate snap-back NFET to provide protection against negative ESD voltage pulses. The combination of a positive and a negative ESD protection clamp provides ESD protection to an IC during either a positive or a negative voltage ESD pulse. Alternate embodiments further reduce the capacitance of the ESD protection circuit by using only a positive ESD clamp to provide ESD protection during a positive ESD pulse while protection for a negative ESD pulse is provided by a discharge path formed by a path of an RF front-end switch coupled to a negative ESD diode.
    • 描述了需要高压和高频操作的RFIC的改进的ESD保护电路。 与预充电电路和二极管网络相结合的共源共栅接地栅极复位NFET(GGNFET)导致具有低电容和高导通电压的正ESD保护钳位。 正电压ESD保护钳在正电压ESD脉冲期间为IC提供ESD保护。 公开了一种负ESD保护钳的示例性实施例,其中使用偏置电路或电荷泵代替预充电电路,以允许偏置电路或电荷泵与二极管网络和共源共栅接地的组合 门复位NFET,以提供防止负ESD电压脉冲的保护。 在正或负电压ESD脉冲期间,正和负ESD保护钳的组合可为IC提供ESD保护。 替代实施例通过仅使用正的ESD钳位来在正的ESD脉冲期间提供ESD保护来进一步减小ESD保护电路的电容,同时通过由RF前端的路径形成的放电路径来提供负的ESD脉冲的保护 开关耦合到负ESD二极管。